New York, Ballantine, 1957. Hardback first edition and first impression. A near fine book in a very good jacket. Signed by the author, "Hal Clement / (Harry Stubbs)". The book has a little offsetting and bumping, the jacket is faded to the spine, has a couple of short tears and a small 1/2 inch chip to lower tip. Scarce signed. Provenance: from the collection of George Locke; author, publisher, dealer, bibliographer and collector. Best known for his Spectrum of Fantasy reference material and Ferret Fantasy.